1101020111209 has 2 divisors, whose sum is σ = 1101020111210. Its totient is φ = 1101020111208.

The previous prime is 1101020111197. The next prime is 1101020111297. The reversal of 1101020111209 is 9021110201011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032662440000 + 68357671209 = 1016200^2 + 261453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101020111209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101020111509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550510055604 + 550510055605.

It is an arithmetic number, because the mean of its divisors is an integer number (550510055605).

Almost surely, 2^{1101020111209} is an apocalyptic number.

It is an amenable number.

1101020111209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101020111209 is an equidigital number, since it uses as much as digits as its factorization.

1101020111209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 1101020111209 in words is "one trillion, one hundred one billion, twenty million, one hundred eleven thousand, two hundred nine".